Telephone system



B. D. CAMPBELL.

TELEPHONE SYSTEM. APPLlCATlON FILED FEB.6, I317.

1,382,89 1 Patented June 28, 1921 4 SHEETS-SHEET I;

B. D. CAMPBELL.

TELEPHONE SYSTEM.

APPLICATION FILED FEB. e. I9Iz Patented June 28, 1921.,

4 SHEETSSHEET 2.

Ivy

B. DUAMPBELL.

TELEPHONE SYSTEM.

APPLICATION FILED FEB. a, 1917.

Pam-Mme '28, 1922.. I

4 SHEETSSHEET 3- INVENTQR 32 M313. Chm/z ZeZZ B. I). CAMPBELL.

TELEPHONE SYSTEM. APPLICATION FILED FEB. s, 1911.

Patented June 28, 192

4 SHEETS-SHEET 4;

PATENT OFFICE.

BRYANT 1D. CAMPBELL, 0F OAKLAND, CALIFORNIA.

TELEPHONE SYSTEM.

Application filed February 6, 1917.

[0 all whom it may concern.

lie it known that I, BRYANT D. CAMPBELL, citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Telephone tivsuuns. of which the following is a speciiication.

This invention relates to coin operated telephone systems and comprises automatic means for registering and counting every coin collected when the coin performs its function in establishing a connection between two telephones in the system.

The invention is illustrated in the accompanying drawings which form a part of this specification and the appended claims.

Referring to the drawings:

Figure l is a diagram of a circuit of the system including two telephones, the circuit and coin mechanism being shown in normal condition.

Figure 2 is a diagram of said circuit showing the transmitter of the calling telephone dead and the bell circuit closed and ringing the bell of the other telephone.

Fig. 3 is a diagram of said circuit in normal condition, after the condition in F ig. 2 has ceased, with the exception that the transmitter of the calling telephone is dead. i

Fig. d is a diagram of said circuit in the condition shown in Fig. 3 and also with the receiver of the calling telephone off the hook and the coin operating and registeringinechanism of said telephone in position holding the coin, which coin is yet to be registered.

Fig. 5 is a diagram of the circuit brought back to its normal condition, the coin having been ejected, after the condition shown in lwhen the party called fails to answer.

Fig. 6 is a diagram of the circuit inthe condition as shown in Fig. 4: except with the called telephone receiver off the hook.

Fig. 7 is diagram of the circuit in the condition as shown in Fig. 4t and with the called telephone speaking and in such con dition that the calling party can hear the called party but can not speak to him.

Fig. 8 is a diagram of the circuit in the condition shown. in Fig. 7 and in the act of registering the coin and depositing it in the coin box.

Specification of Letters Patent.

Patented June 28, 1921.

Serial No. 146,982,

Fig. 9 is a diagram of the circuit after the coin has been registered and deposited and with both telephones in talking condition.

Fig. 10 'is a diagram of the circuit when the parties have ceased talking and placed the receivers ba ck on their hooks, which condition is the normal condition as shown in Fig. 1.

Fig. 11 is a side elevation of the coin mechanism of the telephone system, the easing of said mechanism being shown in section.

Fig. 1.2 is a plan of said mechanism.

Fig. 13 is a View in elevation of the coin mechanism, with certain parts thereof removed, showing the interior operating parts, the casing being shown in section.

F 14 is a sectional view of the coin mechanism taken on line X-X of Fig. 13.

Fig. 15 is a view of a telephone receiver switch for closing a circuit which operates the coin mechanism to return the coin to the calling party when the called party fails to answer.

Fig. 16 is a fragmentary side view of the coin operated switch. for effecting the establishment of complete talking connection leetween two telephone stations.

Referring to Figs. 1 to 10 inclusive A and B represent two telephone stations which are included in the circuit indicated C of an automatic telephone system. Included in the circuit of the system at each station is one of my coin operating and registering mechanisms generally indicated D.

The coin operating and registering mechanism may be described as follows:

Numeral 1 indicates a frame upon which the various parts of the mechanism are mounted. lVithin said frame is located a coin chute 2, extending downwardly from the top of the frame. A bracket 3 extends outwardly from one side wall of the chute, in which a coin arresting lever 4 is pivoted at 5. A pin 6 extends inwardly from said lever and is adapted to be projected through an aperture 7 in the side wall of the chute in the path of the coin as will be described hereinafter. A spring 8 is adjustably clamped at its upper end on a threaded pin 9. extending from the frame, between two thumb nuts 10 and 11, the lower end of which spring engages the coin arresting lever at one side of its pivot and normally ing of chute 2 maintains the lever in position with the pin 6 withdrawn from the chute. A. magnet 12 is mounted adjacent the end of the lever *1 at the side of the pivot opposite the spring 8, on a bracket 13, extending outwardly from the frame, which magnet when ener gized swings the lever i and introduces the pin 6 through slot 7 into the chute 2 in the path of thecoin which pin is adapted to rest the coin in the chute adjacent an opening 15 in wall 16 or said chute as shown in dotted lines in Fig. 13.

it coin-actuating lever 20 is pivoted at 21 to the frame 1 at one side oi the chute and has a pair of pins prciecting from its lower end through slots in the side wall of the chute. A spring 27 secured at 26 to the frame 1 engages the lower portion of the lev r 26 and normally maintains said lever in position with the pins 22 at the ends or the slots 23 at the side of the chute. opposite opening 15, in which position said pins rest adjacent the edge of the coin arrested or the pin 6 as shown in Fig: The lever 21) has a finger book extending: outwardly there from through a, slot 31 inc. casing which incloses the tramexl and the parts therein. The casing 35 is provided with a slot 36 which registers with the upper end of chute 2 through which a coin may be introduced into the upper end of said chute. The openleads into the upper of a chute 37, the lower end of which opens into a coin drawer 38 in the bottom of the casing 1.

A. coinactuatcd register lever 40 is pivoted at 4:1 with its forward arm extending: to'the opening of chute 2 and resting directly above the upper end of chute 37. To the rear oi? said lever is connected the upper end of link 4-2, the lower end of which is connected to the operating arm '13 of a coin registu' 4:5. Ir spring L-(Ssecu ed tothe frame 1 engages the upper side oi the lever and holds said lever and the register operating arm and mechanism in their in'. all position to be operated by the coin as \vri be hereinafter described. A threaded pin 46 extends outwardly from the rear arm of lover all) through a slot 41-9 in one side well oi? thechute 2, on which pin a linger 50 of insulation is clamped between two nuts 51 and which screw on said pin. which linger is adapted to engage a cam surface on the upper end of a spring contact and press the upper end oi said contact into contact with the frame 1 to close an electric circuit hereina'tter described. vided with aside opening-56 at its lower end which communicates with an outlet57 inthe side wall of the casing 35 which outlet opens into-a coin delivery receptacle 60, and the bottom wall 61 of the chute inclines downwardly to said receptacle so as to allow a coin released from the pin 6to roll out of The chute 2 is pro the receiver hook is fulcrurned. Said arm 62 comprises a stationery member secured to the receiver hook and a hinged member 66 which is hinged at 67 to the stationary 1nember Said hinge permits the arm 66 to swing and drag over contact 63 so as not to depress said contact into contact with contact 6-l when the receiver is taken oil the hook and the hook swings up. Said arnr members h vs shoulders 68 and 69 adapted to engage and hold the arm members rigid in alinement so that when thereceiver is replaced upon the hook and the hook swung down, the arm. member 66 will engage and momentarily depress contact 63 into contact with contact 64 and momentarily close the coin ejecting circuit as will be hereinafter described. 7

The operation of my invention is follows:

r-lssume the two stations .rr and B of the system to be in normal condition indicated in Fig. 1 and a person at station A desires to speak to person at station E.

The person at station A closes switch 70 at said station anu establishes an electric circuit from battery 75, through lead 7 6, switch 70, lead 77, magnet 78 and lead 79 back to battery. energizing magnet 78 which closes switch 80 and opens the circuit of transmitter 71 or station A, whereupon an electric circuit is established from battery 7 through lead 81, switch 80. lead 82, switch 76. lead 6?. through the receiver switch 84, 0t station 13, lead 85, bell S6 oi? station E, lead 8'? back to battery, ringing bell 86 of station as indicated in heavy lines in Fig. 27 The person at station A then releases switch 70 and breaks said circuits, whereupon bell 86 ceases rinsing butswitch 80 remains closed and transmitter 71 of station A remains dead. *The calling artv at station A then removes the receiver 90 of said station oii' its hook and closes the receiver switch 91 or" said station. which establishes an electric circuit from battery75, through lead 81, switch 60, loads 82 and 92, receiver switch 91, lead 93. magnet 12, and leads 9-: and 87-back to battery, and energizes magnet which swings lever l and projects pin 6 into the chute 2 which arrests a coin 100 deposited in the slot, as shown in Fig. 13, which ill) condition. is illustrated in heavy lines in Fig. 1, during which condition the transmitter of telephone station A still remains dead. w

N hen the called party at station E fails to answer and the calling party at station A hangs up receiver 90, the switch arm 66 of said receiver engages and momentarily depresses contact 63 into contact with contact 6aand momentarily closes and establishes the coin returning circuit from battel-y 75, through leads 81 and 101, switch E, leads 102 and 103, magnet 105, and leads 106 and 87, back to battery 75, thus energizing magnet 105 which opens switch 80 and breaks the circuit controlling the coin mechanism D, and deenergizes coin mechanism magnet 12, whereupon spring 8 swings the pin end of lever 4: outwardly and withdraws the pin 6 from under the coin 100, allowing the coin to drop and roll along the bottom (51 oi the chute out through opening 56 and outlet 57 into the coin delivery receptacle so that the calling party may take it back. This condition is shown in Fig. 5.

lVhen the czl ed party takes the receiver 110 at the called station oil the hook to answer the calling party at station A, as shown in Fig. 6, receiver switch 111 is closed, which establishes a circuit from battery 75 througl'i lead 87, battery 115, lead 110, switch 120, lead 121, transmitter 125 of station 13, lead 126, receiver 110, lead 127, receiver switch 111, lead 83, lead 128, receiver switch 130 of station 1 1, lead 131, receiver 90 of station A, leads 136 and 137, lead 82, switch 80, lead 81 back to battery 75, in which condition the party at B station may talk to party at A station, but the coin at station A has not yet been collected and registered and the transmitter oi? station A is still dead so that the party at station A cannot yet speak to the party at station E, but can hear said party, which condition is represented in heavy lines in Fig. 7, during which condition the called party at station E answers the calling party at station A.

When the calling party at station A hears the answering party at station 13, the calling party places his finger on hook 30 ol the coin operating and registering mechanism at station A, depresses said hook and swings lever 20 on its pivot, so that the lever pins 22 engage the rear edge of coin 100 and force it backwardly through chute slot 15 between the lower end 140 of said slot and the forward arm of coin register operating lever l1, swinging said lever on its pivot out of the way until the coin passes into chute 37 through which it drops into and is collected by the coin drawer 38 during which operation oi? the lever to, the register a5 is operated through link -12 and arm 43 and the coin is registered by the register, while the arm engages cam 53 and presses switch 55 into contact with frame 1, which momentarily establishes a circuit from battery 75, through leads 81 and 101, lead 145, to frame 1 and through switch 55, then through lead 14-6, lead 103 magnet 105, leads 106 and 87 back to battery 75, as shown in Fig. 8, thus iomentarily energizing magnet 105 and throwing switch 80 to the left, which breaks the circuit including magnet 12, withdrawing pin 6 from chute 2, and establishes a cir- (nit from battery 75, through lead 81, switch 80, lead 150, transmitter 71 of station A, lead 136, receiver 90 of station A, lead 131, a receiver switch 130 of station A, leads 128 and 83, receiver switch 111 of station E, lead 127, receiver 110 of station E, lead 126, transmitter 125 of station E, lead 121, switch 120, lead 116, battery 115, lead 87 back to battery 75, whereby the complete connection between stations 11 and IE is made so that the parties at both stations may talk to and hear each other, which condition is shown in Fig. 9.

hen the parties cease talking to each other and hang up the receivers 90 and 110, the circuit including the two stations A and B is broken and the normal condition is again established as shown in Fig. 10.

Havingdescribed my invention, I claim as new and desire to secure by Letters Patent:

1. I11 a coin-controlled telephone, a coincontrolling mechanism provided with a coin chute normally open so that a coin willpass therethrough and out of said mechanism, a pin, a magnet included in the receiver circuit for projecting said pin into said chute to arrest a coin deposited therein, and means whereby the calling party may actuate said mechanism to collect the coin when he hears the called party.

2. In a coin-controlled telephone system, coin-controlled means operatable entirely by the calling party for completing a connection and for collecting the coin when the called party answers, and for returning the coin when the called partyiails to answer.

3. In a coin-controlled telephone system, coin-controlled means operatable entirely by the calling party for completing a connection and for collecting the coin when the called party answers, and register operatable by said coin-controlled means for registering the collected coin.

4:- In a coin-controlled telephone'system, a register, a register operating lever, means connecting said operating lever with the register mechanism, means operatable entirely by the calling party for collecting the coin when the coin has completed a connection in the system, said lever being adapted to engage said coin and to operate said register and register the coin when the coin is collected.

5. In a coin-controlled telephone system, a register, and coin-controlled means operatable entirely by the calling party engaged by the com for operating said register and registering the coin when the connection be tween two stations has been effected by the coin and the coin is collected, and for returning the coin to the calling'party when the called partyiiails to answer.

6. In a telephone system, a coin means operatable entirely by the calling party for completing a connection between two telephones in the system, and for returning the coin to the calling party upon failing to establish a connection.

7. In a coin-controlled telephone, a coincontrolling mechanism provided with a coin chute normally open so that a coin will pass therethrough and out of said mechanism, said chute being provided with an opening in its wall, a pin mounted to project into said chute below said opening, a magnet included in the receiver circuit for projecting said pin into said chute to arrest a coin deposited therein, a coin box, and an actuating lever for engaging and forcing the coin in the chute through said opening from which the coin drops in said coin boX.

8. In a coin-controlled telephone, a coincontrolling mechanism provided with a coin chute normally open so that a coin will pass therethrough and out of said mechanism, a pin, a magnet included in the receiving circuit for projecting said pin into said chute to arrest a coin deposited therein, a coin register, a lever for actuating said register, a coin box, and means for forcing the arrested coin out of the chute into engagement with said lever to actuate the register and into the coin box. v

9. In a telephone system, a coin means the calling party for completing a connection and for collecting the coin wnen the called party answers, and for returning the coin when the called party falls to answer, anda register operatable by sald coin-controlled means for registering the collected coin.

12. In a coin-controlled telephone, a coincontrolling mechanism provided with a coin chute normally open so that a coin will pass therethrough and out of said mechanism, a pin mounted to be projected into said chute, means in the receiver circuit for shortening out the transmitter of the callin party when said party takes the receiver oil the hook, a magnet included in the receiver circuit for projecting said pin into said chute to arrest a coin dropped therein, means whereby the calling party may actuate said mechanism to collect the arrested coin when he hears the called party, and a switch closed by said actuating means for establishing the transmitter circuit when the coin is collected.

In testimony whereof I aflix my signature.

BRYANT D. CAMPBELL. 

